/Engine/Plugins/Animation/ControlRig/Source/ControlRig/Public/Rigs/RigHierarchy.h
Returns true if an element is parented to another element
True if the given parent and given child have a parent-child relationship
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=URigHierarchy) bool IsParentedTo ( [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InChild, [FRigElementKey](API\Plugins\ControlRig\Rigs\FRigElementKey) InParent ) const